/Engine/Source/Runtime/HeadMountedDisplay/Public/IXRTrackingSystem.h
Main access point to an XR tracking system. Use it to enumerate devices and query their poses.
class IXRTrackingSystem : public [IModularFeature](API\Runtime\Core\Features\IModularFeature), public [IXRSystemIdentifier](API\Runtime\HeadMountedDisplay\IXRSystemIdentifier)